Textile material



Patented Oct. 27, 1936 UNITED "STATES PAT'VEQN'VT OFFICE 2,058,779 TEXTILE MATERIAL Henry Dreyfus, London, and William Alexander Dickie, Spondon, near Derby, England, as-

signors to Celanesc Corporation of America, a corporation of Delaware I No Drawing. Original application December 10,.

1930, Serial No. 501,461. Divided and this applicatlon July 18, 1934, Serial N0. 135,790.

- In GreatBritain December'24, 1929 31 Claims. (01. 28-1) This invention is a division .of United States application Serial -No. 501,461 filed 10th December, 1930 and relates to the manufacture of textile fabrics, more particularly textile fabrics ex-' hibiting crepe effects. L Textile-materials exhibiting crepe effects have long been obtained by employing in their construction highly twisted yarns (hereinafter referred'to as crepe yarns or crepe threads) made effects appearing when the gum is subsequently removed by a suitable scouring or like treatment. Crepe effects are, however, only obtained with difficulty by employment of highly twisted crepe threads made of cellulose acetate or other organic derivatives of cellulose. Thus, for instance, a fabric containing highly twisted weft threads of cellulose acetate shows only a relatively slight crepe effect after treatment in an aqueous scourgq, ing bath.

We have now discovered anew method for the production of crepe fabrics and more particularly crepe fabrics containing cellulose acetate or other cellulose esters or ethers. According to our in- 25 vention, fabrics exhibiting crepe effects are produced by subjecting to the action of an aqueous medium fabrics made with crepe twisted threads, particularly crepe twisted threads of cellulose acetate or other cellulose ester or ether, which 30 threads are mpregnated with azinc halide, e. g.

zinc chlori e, or calciumchloride or nitrate or -sodium'iodide.' It will be noted that each of these compounds has a high ailinlty' for water. In carrying the invention into effect, the im- 35 pregnation of the filaments or'fibres of the crepe twisted threads may be effected in any desired manner, for example the compound having a high afiinity for water may be applied to fabrics con-, taining the crepe twisted threads. The com-- 9- pounds may, however, be incorporated in theamplethe compounds may be applied to 'or ina materials at. any other convenient stage of the manufacture of the fabrics or of the manufacture' ofthe crepe threads, or of the yarnsior fllaments from which they are produced. .For ex-.

corporated in the crepe threads prior to weaving and either before or after the application of the requisltehigh degree of twist. For example the threads may, prior to crepe twisting, be treated with an aqueous solution of one of the compounds and then'dried.

Where the crepe threads are made of or ccn- I tain artificial filaments or fibres, thesaid compounds'may be incorporated in the artificial filaments or fibres during-processesiof their manufacture. For example, they may be incorporated in solutions of cellulose esters or ethers and the latter converted into filaments by.extrusion into an evaporative atmosphere or into a coagulating bath as may be desired or requisite. Thus, calbe caused to exhibit crepe effects by simple treatment with an aqueous liquid. Fabrics containing crepe twisted threads or filaments or fibres impregnated with the compounds of the invention may-be treated with water or other aqueous liquid in any desired man'- ner in order to effect creping, i. e. the production of the desired effects. A creping treatment with water may, for example, be effected at ordinary or raised temperature and with the additionor not of soaps, wetting agents,-salts, acids or any other substances designed to accentuate or th:- erwise modify the creping action of the water. If desired the creping treatment may be combined with another subsequent treatment, for example with the dyeing of the fabric.

If desired the crepe threads may be sized at any suitable stage, e. g. before or after twisting to the requisite hi h degree. Preferably such sizing and the aqueo after-treatment are effected in accordance with the principles described in production 1p: crepe fabrics comprising crepe threads made of or containing filaments of organic derivatives of cellulose, for example-cellulose esters, e. g. cellulose acetate, formate, propionate. or'butyrate, or cellulose ethers, e. g.

methyhethyl or benzyl cellulose. For instance crepe'threads may be employed which consist entirely of filaments of cellulose esters or ethers or which comprise also other textilev fibres or fllaments, for example fibres or filaments of cotton,

.silk or regenerated cellulose. Again, fabrics may be constructed entirely of, yarns of organic sub- 1 stitution derivatives of cellulose or they may comprise threads or yarns of other'textile materials, for example cotton, silk or a regenerated. cellulose type of artificial silk.

The degree. of twist imparted to the yarns or threads serving to give the crepe effects may be similar to that commonly employed in the production of crepe threads from silk in the summed state, but any other suitable degree of crepe'twist W may be employed according to the effects it is.

contain them. In general it is found convenient to employ threads of relatively low twist in the warp and to employ as the weft both crepe threads having a left-hand crepe twist and crepe threads having a right-hand crepe twist. The threads having rightand left-hand crepe twist respectiveiy may be incorporated in any convenient manner, for example pairs of (weft threads of right-hand crepe twist may alternate with pairs of threads of left-hand crepe twist. If desired composite crepe threads may be prepared by doubling the impregnated or treated crepe threads with crepe threads not so treated. By weaving such threads into fabrics, with or without other threads whether of crepe twist orof low twist, and subsequently subjecting the material of the treated threads to an "aqueous treatment, fabrics exhibiting a variety of fancy andother effects may be produced. Q

What we claim and desire to securev by Letters Patent is:-

1. Process for producing crepe fabrics, which comprises treating with an aqueous liquid a fabric containing crepe twisted threads of an organic derivative of cellulose, which threads are' substantially dry and are impregnated with an agent having a high aflinity for water.

2. Process for producing crepe fabrics, which comprises treating with an aqueous liquid a fabric containing crepe twisted cellulose acetate threads which are substantially dry and are impregnated with an agent having a high affinity for water.

3. Process for producing crepe fabrics, which comprises treating with an aqueous liquid a fabric containing crepe twisted threads of an organic derivative of cellulose, which threads are substantially dry and are impregnated with an inorganic salt having a high affinity for water.

4. Process for producing crepe fabrics, which comprises treating with an aqueous liquid a fabric containing crepe twisted cellulose acetate. threads which threads are substantially dry and are impregnated with an inorganic salt having a high affinity for water.

5. Process for producing fabrics exhibiting crepe effects which comprises crepe twisting threads spun from a solution of an organic derivative of cellulose, said solution containing a substance having a high aflinity for water, incorporating the crepe twisted threads in a fabric, and subjecting the fabric to the action of an aqueous medium.

6. Process for producing fabrics exhibiting crepe effects, whichv comprises crepe twisting threads spun from a solution of cellulose acetate,

I said solution containing a substance having a high ailinity for water, incorporating the crepe twisted threads in a fabric, and subjecting the fabric to the action of an aqueous medium.

7. A process for producing crepe effects on fabrics which comprises fabricating highly twisted cellulose acetateyarns containing a substance which has a'high solution tension for water into a fabric, and-treating the fabric with an aqueous medium.

HENRY DREYFUS. WILLIAM ALEXANDERDICKIE. 

